With my proven track record in the industry, in-depth knowledge of Blender's capabilities, and specialization in 3D animation and modelling, I confidently express my suitability for this project. Having worked on numerous similar projects, I'm skilled in making fabrics look lifelike - an integral aspect of your request for upgrading the leotard's texture and material properties. My expertise also extends to creating realistic folds and seams that'll add a delicate yet impactful touch to the model.
Moreover, my experience with lighting and camera settings, especially for product renders, will ensure the leotard is showcased in its most enchanting form. The added cherry on top: I can make that sparkle effect come to life with a lens flare, perfectly matching your reference image.
On a personal note, I genuinely appreciate the beauty of traditional aesthetics, as you want for this project. Thus, you can rest assured that I will put all my efforts into achieving the precise look you're after. So let's collaborate and create a 360-degree rotating leotard model that'll be a showstopper in every sense.
Together, we'll turn your vision for a breathtakingly real and captivatingly shimmering rhythmic gymnastics leotard into an awe-inspiring reality.